Health Case Ripples Outward

Ruling Against Mandate Would Pressure Insurers, Loom Large in November Election

By

Janet Adamy,

Jess Bravin and

Anna Wilde Mathews

Updated March 28, 2012 11:28 p.m. ET

After three days of historic Supreme Court debate, the political world and health-care companies confronted the prospect of President Barack Obama's health law being wiped away, a decision that would upend years of planning by businesses and roil the November elections.

Among those set to implement the law, insurers would have to ditch changes to their businesses designed to bring in millions of new customers. Provisions that have...